I have created a new MEDM file which shows which reference file (safe.snap or OBSSERVE.snap) each front end model's SDF is using. It is created by a new script called create_fe_sdf_source_file_list.py. It shows that all systems have been ported to the new OBSERVE.snap standard with the exception of: IOP models, PEM models, SUSAUX models and ODCMASTER.
The new screen is accessible from the SITEMAP via the CDS pull down, "FE SDF Reference Files" item